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Diffstat (limited to '')
-rw-r--r-- | arch/csky/include/asm/pgalloc.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/arch/csky/include/asm/pgalloc.h b/arch/csky/include/asm/pgalloc.h new file mode 100644 index 0000000000..9c84c9012e --- /dev/null +++ b/arch/csky/include/asm/pgalloc.h @@ -0,0 +1,74 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __ASM_CSKY_PGALLOC_H +#define __ASM_CSKY_PGALLOC_H + +#include <linux/highmem.h> +#include <linux/mm.h> +#include <linux/sched.h> + +#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL +#include <asm-generic/pgalloc.h> + +static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, + pte_t *pte) +{ + set_pmd(pmd, __pmd(__pa(pte))); +} + +static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, + pgtable_t pte) +{ + set_pmd(pmd, __pmd(__pa(page_address(pte)))); +} + +extern void pgd_init(unsigned long *p); + +static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm) +{ + pte_t *pte; + unsigned long i; + + pte = (pte_t *) __get_free_page(GFP_KERNEL); + if (!pte) + return NULL; + + for (i = 0; i < PAGE_SIZE/sizeof(pte_t); i++) + (pte + i)->pte_low = _PAGE_GLOBAL; + + return pte; +} + +static inline pgd_t *pgd_alloc(struct mm_struct *mm) +{ + pgd_t *ret; + pgd_t *init; + + ret = (pgd_t *) __get_free_page(GFP_KERNEL); + if (ret) { + init = pgd_offset(&init_mm, 0UL); + pgd_init((unsigned long *)ret); + memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD, + (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); + /* prevent out of order excute */ + smp_mb(); +#ifdef CONFIG_CPU_NEED_TLBSYNC + dcache_wb_range((unsigned int)ret, + (unsigned int)(ret + PTRS_PER_PGD)); +#endif + } + + return ret; +} + +#define __pte_free_tlb(tlb, pte, address) \ +do { \ + pagetable_pte_dtor(page_ptdesc(pte)); \ + tlb_remove_page_ptdesc(tlb, page_ptdesc(pte)); \ +} while (0) + +extern void pagetable_init(void); +extern void mmu_init(unsigned long min_pfn, unsigned long max_pfn); +extern void pre_trap_init(void); + +#endif /* __ASM_CSKY_PGALLOC_H */ |